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// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
// The result of the expression const_cast<T>(v) is of type T. If T is
// an lvalue reference to object type, the result is an lvalue; if T
// is an rvalue reference to object type, the result is an xvalue;.
unsigned int f(int);
struct X {};
template<typename T> T& lvalue();
template<typename T> T&& xvalue();
template<typename T> T prvalue();
void test_classification(const int *ptr, X x) {
int *&&ptr0 = const_cast<int *&&>(ptr);
int *&&ptr1 = const_cast<int *&&>(xvalue<const int*>());
int *&&ptr2 = const_cast<int *&&>(prvalue<const int*>()); // expected-error {{const_cast from rvalue to reference type 'int *&&'}}
X &&ptr3 = const_cast<X&&>(x);
X &&ptr4 = const_cast<X&&>(xvalue<X>());
X &&ptr5 = const_cast<X&&>(prvalue<X>());
int *&ptr6 = const_cast<int *&>(ptr);
int *&ptr7 = const_cast<int *&>(xvalue<const int*>()); // expected-error {{const_cast from rvalue to reference type 'int *&'}}
int *&ptr8 = const_cast<int *&>(prvalue<const int*>()); // expected-error {{const_cast from rvalue to reference type 'int *&'}}
X &ptr9 = const_cast<X&>(x);
X &ptrA = const_cast<X&>(xvalue<X>()); // expected-error {{const_cast from rvalue to reference type 'X &'}}
X &ptrB = const_cast<X&>(prvalue<X>()); // expected-error {{const_cast from rvalue to reference type 'X &'}}
}
struct A {
volatile unsigned ubf : 4;
volatile unsigned uv;
volatile int sv;
void foo();
bool pred();
};
void test(A &a) {
unsigned &t0 = const_cast<unsigned&>(a.ubf); // expected-error {{const_cast from bit-field lvalue to reference type}}
unsigned &t1 = const_cast<unsigned&>(a.foo(), a.ubf); // expected-error {{const_cast from bit-field lvalue to reference type}}
unsigned &t2 = const_cast<unsigned&>(a.pred() ? a.ubf : a.ubf); // expected-error {{const_cast from bit-field lvalue to reference type}}
unsigned &t3 = const_cast<unsigned&>(a.pred() ? a.ubf : a.uv); // expected-error {{const_cast from bit-field lvalue to reference type}}
unsigned &t4 = const_cast<unsigned&>(a.pred() ? a.ubf : a.sv); // expected-error {{const_cast from rvalue to reference type}}
}
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